WANG Zhi-gang, LIU Wen-qing, ZHANG Yu-jun, ZHAO Nan-jing, LI Hong-bin, SIMA Wei-chang, XIAO Xue, LIU Jian-guo. Application research of laser-induced fluorescence technique for water quality monitoring[J]. Advances in Water Science, 2008, 19(2): 280-284.
Citation: WANG Zhi-gang, LIU Wen-qing, ZHANG Yu-jun, ZHAO Nan-jing, LI Hong-bin, SIMA Wei-chang, XIAO Xue, LIU Jian-guo. Application research of laser-induced fluorescence technique for water quality monitoring[J]. Advances in Water Science, 2008, 19(2): 280-284.

Application research of laser-induced fluorescence technique for water quality monitoring

  • Technique of laser induced fluorescence(LIF)remote sensing can be used in water quality monitoring for large water area.A detail water quality investigation for Taihu lake is conducted with the LIF remote sensing system.According to the principle of LIF remote sensing for water quality,the dissolved organic matter(DOM)fluorescence factor,the Rayleigh scattering factor and the chlorophyll-a fluorescence factor correspond to DOM concentration,the turbidity and the chlorophyll-a concentration respectively.The concentrations of DOM are determined by three dimension fluorescence imager,and the turbidity and the chlorophyll-a concentrations are determined by YSI multi-parameter water quality meter.The results of LIF remote sensing system,three dimension fluorescence imager and multi-parameter water quality meter are compared,which indicates that DOM fluo-rescence factors determined by LIF remote sensing system and DOM concentrations determined by three dimension fluorescence agree very well(R=0.88733).However,the Rayleigh scattering factors and the chlorophyll-a fluorescence factors determined by LIF remote sensing system do not agree with the turbidity and the chlorophyll-a concentrations determined by YSI multi-parameter water quality meter,respectively.The linear relative coefficient are -0.39185 and 0.4552,and the causes are discussed.The application potential and the probable limits of LIF remote sensing in the water quality are expatiated further.
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